CN103123017A - Shallow sea long-distance submarine pipeline tension-free laying construction technology - Google Patents
Shallow sea long-distance submarine pipeline tension-free laying construction technology Download PDFInfo
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- CN103123017A CN103123017A CN2012104798632A CN201210479863A CN103123017A CN 103123017 A CN103123017 A CN 103123017A CN 2012104798632 A CN2012104798632 A CN 2012104798632A CN 201210479863 A CN201210479863 A CN 201210479863A CN 103123017 A CN103123017 A CN 103123017A
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Abstract
The invention relates to a shallow sea long-distance submarine pipeline tension-free laying construction technology. Firstly, submarine finished short steel pipes are hoisted on a pipe-laying vessel, then the submarine finished short steel pipes are welded one by one, and the pipe-laying vessel adopts an tension-free pipe-laying method through a pipe supporting frame, arranges the steel pipes into water from the tail of the vessel and lays the steel pipes on a seabed. Before the pipes are laid, the pipe-laying vessel is positioned, drops an anchor, then starts a main traction anchor and a deviation-correcting anchor machine, and adjusts the pipe-laying angle and posture of the pipe supporting frame according to the water depth conditions. According to the shallow sea long-distance submarine pipeline tension-free laying construction technology, a submarine pipeline made of common steel serves as a water conveying pipeline, so that construction cost is largely reduced on the premise that the construction safety is guaranteed. The shallow sea long-distance submarine pipeline tension-free laying construction technology is a beneficial pioneering work in the submarine pipeline laying construction, has a wide market in the field of submarine pipeline construction, and has large economical benefits and social benefits. The pipeline is laid under the sea, and does not damage and affect the sea environment.
Description
Technical field
The present invention relates to a kind of construction process of laying apart from submarine pipeline for shallow sea length.
Background technique
China coast has numerous island, along with the development of national economy, on the island, the demand of fresh water increases day by day, only depends on the ponding of reservoir can not satisfy the demand of development, therefore need to replenish fresh water by other means, method commonly used is laid the seafloor water delivery pipe road exactly.The at present construction of seabed long-distance pipe is mainly used in the offshore oil system, is mainly to adopt " J " type and " S " type tubine method, must be high-strength material yet these construction procesies all require the material of pipeline, adopts the tensammetry construction.Project investment is very high.And for the steel pipe that adopts common material (Q235) as the seafloor water delivery pipe road; long very extensive in the application of the aspects such as submarine oil-transportation apart from the seabed steel pipe; but common seabed steel pipe material is to adopt high-intensity alloyed steel; adopt blank pipe tension force construction (J type and S type tubine method); pipe outer cladding concrete during construction is as counterweight and the protective layer of steel pipe.This form of construction work is had relatively high expectations to tubing, so investment cost is larger.Very uneconomical for the people's livelihood engineering of seabed water delivery, be difficult to promotional value.
And the large-caliber thin-walled pipeline (diameter 1.0 ~ 1.2m volute) that adopts conventional Q235 material is that tool has an enormous advantage and Economy as the seafloor water delivery pipe road.Therefore, how safety be applied to the key that the seabed is whole Project Success, in case success will greatly reduce project investment.
Summary of the invention
The present invention be to provide a kind of shallow sea length apart from submarine pipeline without tension force cable laying operation technique, this construction process can solve common iron long apart from the stressed safety in the submarine pipeline construction, guarantee that tension force that common steel tube is subject to and other external force loads are all within the allowed band of steel self in construction.
The technical solution adopted for the present invention to solve the technical problems is: a kind of shallow sea length apart from submarine pipeline without tension force cable laying operation technique, its process step is: at first with the upper laying barge of seabed finished product short steel pipes lifting, then with the welding piecemeal on laying barge of seabed finished product short steel pipes, laying barge adopts without tension force tubine method by pipe support rack, with steel pipe from the stern entry and be applied to sea bed.
Before tubine, laying barge is located and is cast anchor, and then starts main traction anchor and correction windlass, adjusts pipe support rack tubine angle and attitude according to depth of water situation.
In the tubine process, applied the long pipe support rack protection of steel pipe by landing, pipe support rack is born the stressed of unsettled section steel pipe simultaneously, makes steel pipe satisfy the requirement of construction period stress, strain under tension-free state.
The invention has the beneficial effects as follows: the submarine pipeline that adopts conventional steel to make is guaranteeing to greatly reduce engineering cost under the high prerequisite of engineering safety as aqueduct, this is the invention of an economic benefits in the submarine pipeline laying work, and it will have wide market certainly in the submarine pipeline engineering field.Have larger economic benefit and social benefit, he is laid in the seabed simultaneously, and ocean environment is not caused any destruction and impact.This technique is laid the spiral weld steel pipe of common iron for submarine pipeline, general submarine pipeline lays to avoid uses this type of steel pipe, seamless or steel pipes with straight commonly used.It is not only to have reduced engineering cost, the more important thing is the extension of seabed tubine type selecting, takes full advantage of conventional resource.Have again, by the submarine pipeline water delivery, the freshwater resources of large land affluence can be transported on the island of shortage of fresh water, realize resource complementation, promote further developing of society.
Description of drawings
Fig. 1 is flow chart of the present invention;
Fig. 2 is construction schematic diagram of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, shallow sea of the present invention length without tension force cable laying operation technique, comprises that the transportation of seabed finished product pipeline, the welding → top of lifting → pipeline log in → the deposited buried pipe construction → terminal landing of middle marine site section apart from submarine pipeline.
At first with the upper laying barge of seabed finished product short steel pipes lifting, then with the welding piecemeal on laying barge of seabed finished product short steel pipes, laying barge adopts without tension force tubine method by pipe support rack, with steel pipe from the stern entry and be applied to sea bed.
Before tubine, laying barge is located and is cast anchor, and then starts main traction anchor and correction windlass, adjusts pipe support rack tubine angle and attitude according to depth of water situation.
In the tubine process, applied the long pipe support rack protection of steel pipe by landing, pipe support rack is born the stressed of unsettled section steel pipe simultaneously, makes steel pipe satisfy the requirement of construction period stress, strain under tension-free state.
As shown in Figure 2, laying barge 1 rear end is equipped with launcher 2, and front end has welding station 3, and pipe support rack 4 is equipped with in welding station 3 back, and pipe support rack 4 front ends are equipped with steel flaps 5.
This technique is large for seabed steel pipe bore, wall thickness, the low characteristics of self intensity; develop a cover and applied steel pipe by the long pipe support rack protection that lands; and bear the stressed of unsettled section steel pipe; make steel pipe satisfy the requirement of construction period stress, strain under tension-free state; steel pipe does not increase counterweight simultaneously, the interior water-filling of pipe lays, and has greatly improved the safety and reliability of submarine pipeline.
Cardinal principle is: steel pipe is welding piecemeal on laying barge, then adopts without tension force tubine method by pipe support rack steel pipe is applied to the seabed.
Seabed steel pipe bore is large, wall thickness, self intensity low (being generally Q235), can be volute.Being applied steel pipe does not increase counterweight, water-filling in pipe when laying.Steel pipe is after welding one by one on laying barge, and laying barge moves ship with the method for twist anchor hawser and advances.
Claims (3)
- A shallow sea length apart from submarine pipeline without tension force cable laying operation technique, it is characterized in that, its process step is: at first with the upper laying barge of seabed finished product short steel pipes lifting, then with the welding piecemeal on laying barge of seabed finished product short steel pipes, laying barge adopts without tension force tubine method by pipe support rack, with steel pipe from the stern entry and be applied to sea bed.
- 2. shallow sea according to claim 1 length, is characterized in that without tension force cable laying operation technique apart from submarine pipeline; Before tubine, laying barge is located and is cast anchor, and then starts main traction anchor and correction windlass, adjusts pipe support rack tubine angle and attitude according to depth of water situation.
- Shallow sea according to claim 1 length apart from submarine pipeline without tension force cable laying operation technique; it is characterized in that: in the tubine process; applied the long pipe support rack protection of steel pipe by landing; pipe support rack is born the stressed of unsettled section steel pipe simultaneously, makes steel pipe satisfy the requirement of construction period stress, strain under tension-free state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104798632A CN103123017A (en) | 2012-11-23 | 2012-11-23 | Shallow sea long-distance submarine pipeline tension-free laying construction technology |
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| CN2012104798632A CN103123017A (en) | 2012-11-23 | 2012-11-23 | Shallow sea long-distance submarine pipeline tension-free laying construction technology |
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| CN103123017A true CN103123017A (en) | 2013-05-29 |
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| CN2012104798632A Pending CN103123017A (en) | 2012-11-23 | 2012-11-23 | Shallow sea long-distance submarine pipeline tension-free laying construction technology |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527851A (en) * | 2013-10-18 | 2014-01-22 | 中国海洋石油总公司 | Pre-laying process of submarine pipeline start laying system |
| CN103604000A (en) * | 2013-11-19 | 2014-02-26 | 厦门水务集团有限公司 | River and sea bottom steel jacking pipe butt joint construction method |
| CN105179808A (en) * | 2015-09-23 | 2015-12-23 | 中国石油集团海洋工程（青岛）有限公司 | Pipe laying construction method adopted after pre-ditching of long-distance subsea pipeline |
| CN105952968A (en) * | 2016-07-20 | 2016-09-21 | 上海振华重工(集团)股份有限公司 | Stinger angle adjustment system |
| CN106786193A (en) * | 2016-12-26 | 2017-05-31 | 浙江舟山启明电力集团公司海缆工程公司 | Long range intertidal zone submarine cable logs in cable laying operation operational method and system |
| CN110185845A (en) * | 2019-06-05 | 2019-08-30 | 中交第三航务工程局有限公司南京分公司 | A kind of major diameter HDPE pipeline at sea sinking technique under complex working condition |
| CN110397793A (en) * | 2019-08-05 | 2019-11-01 | 海洋石油工程股份有限公司 | Pipe installation method in the region of cofferdam |
| CN110924864A (en) * | 2019-12-09 | 2020-03-27 | 浙江中水工程技术有限公司 | Directional drilling traction construction method for offshore water delivery pipeline |
| CN112856040A (en) * | 2020-12-31 | 2021-05-28 | 中交第三航务工程局有限公司江苏分公司 | Novel sea area pipeline laying floating assisting method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527851A (en) * | 2013-10-18 | 2014-01-22 | 中国海洋石油总公司 | Pre-laying process of submarine pipeline start laying system |
| CN103604000B (en) * | 2013-11-19 | 2016-03-23 | 厦门水务集团有限公司 | River sea bottom steel push pipe docking method of construction |
| CN103604000A (en) * | 2013-11-19 | 2014-02-26 | 厦门水务集团有限公司 | River and sea bottom steel jacking pipe butt joint construction method |
| CN105179808B (en) * | 2015-09-23 | 2017-08-29 | 中国石油集团海洋工程（青岛）有限公司 | Pipe laying construction method after the pre- ditching of long range submerged pipeline |
| CN105179808A (en) * | 2015-09-23 | 2015-12-23 | 中国石油集团海洋工程（青岛）有限公司 | Pipe laying construction method adopted after pre-ditching of long-distance subsea pipeline |
| CN105952968A (en) * | 2016-07-20 | 2016-09-21 | 上海振华重工(集团)股份有限公司 | Stinger angle adjustment system |
| CN105952968B (en) * | 2016-07-20 | 2018-05-08 | 上海振华重工(集团)股份有限公司 | A kind of stinger angular adjustment system |
| CN106786193A (en) * | 2016-12-26 | 2017-05-31 | 浙江舟山启明电力集团公司海缆工程公司 | Long range intertidal zone submarine cable logs in cable laying operation operational method and system |
| CN106786193B (en) * | 2016-12-26 | 2018-08-21 | 浙江舟山启明电力集团公司海缆工程公司 | Long range intertidal zone submarine cable logs in cable laying operation operational method and system |
| CN110185845A (en) * | 2019-06-05 | 2019-08-30 | 中交第三航务工程局有限公司南京分公司 | A kind of major diameter HDPE pipeline at sea sinking technique under complex working condition |
| CN110397793A (en) * | 2019-08-05 | 2019-11-01 | 海洋石油工程股份有限公司 | Pipe installation method in the region of cofferdam |
| CN110924864A (en) * | 2019-12-09 | 2020-03-27 | 浙江中水工程技术有限公司 | Directional drilling traction construction method for offshore water delivery pipeline |
| CN112856040A (en) * | 2020-12-31 | 2021-05-28 | 中交第三航务工程局有限公司江苏分公司 | Novel sea area pipeline laying floating assisting method |
| CN112856040B (en) * | 2020-12-31 | 2022-03-08 | 中交第三航务工程局有限公司江苏分公司 | Novel sea area pipeline laying floating assisting method |
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Application publication date: 20130529 |